Perminov, Andrey, Yury Zhuravlev, Yury Lukyanov, Sergey Tikhonov, and Alexander Ilyin. “DETERMINATION OF CHAMBER AND PISTON GEOMETRY FOR A ROTARY TYPE EXPANSION MACHINE”. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference 3 (June 20, 2019): 197–200. Accessed April 10, 2025. https://journals23.rta.lv/index.php/ETR/article/view/4060.